Science 10 Quarter 1 Exam

How many reversals of the Earth's magnetic field are depicted in the figure?

• 3

• 4

• 6

• 7

How fast are C and D spreading apart from each other?

• about 2 centimeters per year

• about 5 centimeters per year

• about 10 centimeters per year

• about 100 centimeters per year

An important aspect of seismic waves is that they have different time gaps on

seismograms from different locations. Why would a seismogram recorded closer

to the epicenter have the P and S wave arrivals closer together than on a

seismogram from farther away?

• P waves are faster, so they “pull away” form S waves with increasing

  distance from the epicenter.

• S waves are faster, so they “catch up” to P waves with increasing

  distance from the epicenter.

• P waves travel faster if the earthquake is larger, whereas S waves are

  slowed down by larger earthquakes.

• P waves speed up with distance from the epicenter, whereas S waves

  slow down with distance due to energy absorbance by the P wave.

Where are most volcanoes situated?

• along fault lines

• concentrated on continental edges

• near mountain ranges

• under the oceanic crust

Which famous Philippine volcano is usually seen in world maps due to its violent eruption in 1991?

• Bulusan

• Kanlaon

• Mayon

• Pinatubo

Most transform fault boundaries are found in the oceans; a few are on the

continents. An example of this type is the San Andreas Fault located in

• Marikina, Philippines

• California, USA

• Japan

• Saudi Arabia

Which of the following is NOT a driving force of tectonic plates?

• ridge push

• slab push

• drag force

• mantle convection

Plates float on the surface of the mantle. Which plate pushes the Philippine Plate

toward the Eurasian Plate?

• Cocos Plate

• Indo-Australian Plate

• Nazca Plate

• Pacific Plate

At which type of plate margin would you expect to find the most explosive volcanic activity?

• Divergent (constructive)

• Convergent (oceanic-oceanic)

• Convergent (oceanic-continental)

• Convergent (continental-continental)

Which of the following best illustrates the figure ?

I.   Lithospheric plates are moving towards one another.

II.  Earthquakes produced in areas where plate collisions occurred.

III. Volcanic activity and crustal deformation are not possible to occur.

• I and II

• I and III

• II and III

• I, II and III